Green Fun: Instant Toys, Tricks, and Amusements Anyone Can Make from Common Weeds, Seeds, Leaves and Flowering Things by Maryanne Gjersvik, The Chatham Press, 1972
When light travels through areas of different air density, it bends. You’ve probably noticed the way distant pavement seems to shimmer on a hot day, or the way stars appear to twinkle. You’re seeing light that has been distorted as it passes through varying air densities, which are in turn created by varying temperatures and pressures.
Schlieren Flow Visualization can be used to visually capture these changes in density: the rising heat from a candle, the turbulence around an airplane wing, the plume of a sneeze … even sound. Special thanks to Mike Hargather, a professor of mechanical engineering at New Mexico Tech, who kindly provided a lot of these videos.
I’m totally Schlieren right now. Amazing sights of sounds.
Pondering what it means, if anything, that three very influential makers/thinkers in my life were born and raised in Scotland: Norman McLaren, Ivor Cutler, and John Muir.
Perhaps all it means is destitute, grey, strict upbringings can produce wildly creative and passionate people.